The shutdown brought bluer skies but more nighttime ozone to California

Since social distancing measures to prevent COVID-19 have emptied freeways, businesses and beaches, Southern Californians have been treated to dazzling blue skies and the fluffiest, whitest clouds imaginable. The reason? Staying at home reduces emissions of nitrogen oxides, or NOx, which reduces air pollution. One UC Riverside air quality researcher thinks that's both good news and bad news. To maintain our cleaner air and slow climate change by reducing pollutants, some of the shutdown's lifestyle changes, such as teleworking, need to continue long after we've vanquished the pandemic. Read more....